1022155213217 has 2 divisors, whose sum is σ = 1022155213218. Its totient is φ = 1022155213216.

The previous prime is 1022155213213. The next prime is 1022155213243. The reversal of 1022155213217 is 7123125512201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1020243425041 + 1911788176 = 1010071^2 + 43724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022155213217 - 2² = 1022155213213 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022155213213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511077606608 + 511077606609.

It is an arithmetic number, because the mean of its divisors is an integer number (511077606609).

Almost surely, 2^{1022155213217} is an apocalyptic number.

It is an amenable number.

1022155213217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022155213217 is an equidigital number, since it uses as much as digits as its factorization.

1022155213217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 1022155213217 in words is "one trillion, twenty-two billion, one hundred fifty-five million, two hundred thirteen thousand, two hundred seventeen".